Edward m



(-No Model.)

B. M. PARKER.

OONVEYER FOR GRAIN DRIERS.

No. 481,672. Patented Aug. 30, 1892.

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Qiiesl) fizvenim UNITED STATES PATENT OFFICE.

EDWARD M. PARKER, OF NElV YORK, N. Y.

CONVEYER FOR GRAIN-DRIERS.

SPECIFICATION forming part of Letters Patent No. 481,672, dated August30, 1892.

Application filed June 27, 1891. Serial No. 397,729- (No modeLl T0 atwhom it may concern:

Be it known that I, EDWARD M. PARKER, a citizen of the United States,and a resident of the city, county, and State of New York, have inventedcertain new and useful Improvements in Conveyors for Grain-Briers, ofwhich the following is a specification.

My invention relates to that class of graindriers or apparatus fordrying brewers grains and similar substances in which the grain is fedcontinuously through a series of cylindrical pipes called conveyers, andprovided with a feeding-screw, by which the grain received at one end ofthe conveyer is fed forward to the other end, where it drops to the nextsucceeding cylinder, and so on.

Many forms of such conveyers are now in use, the successive cylinderssometimes arranged one above the other vertically and sometimes arrangedin a nearly-horizontal series, and many difierent constructions of thefeed-screw, the cylinder itself, the means for operating the same, andheating and cooling the cylinders are well known.

My invention consists in improvements made in the construction of theconveyer whereby the hot blast is received with less tendency tooverheat the bearing on which the conveyer turns and is made to permeatethe grain more thoroughly than has heretofore been the case.

In the accompanying drawings, Figure 1 represents two such conveyersarranged one above the other, the means for operating said conveyer andthe rest of the series not being shown, as many well-known forms ofarranging and operating the same will readily suggest themselves. Fig. 2shows the cylindershell as constructed in my improved manner, one of thebands being slipped off of the end. Fig. 3 is a cross-section of thefeed-screw.

Same letters indicate similar parts in the different figures.

A is the box at the top of the apparatus, into which the grain is firstfed.

B represents the cylinders, open at both ends, one end communicatingwith one of the boxes of the series AA and the other end communicatingwith one of the'scries of boxes 0 C, so that when the grain is fedthrough the conveyer B into 0 it dropsupon the conveying-shaft at O bywhich it is fed back to the box A, when it drops into the next box andconveyer, and so on.

Each cylinder is provided with the hollow v perforated shaft D, intowhich the hot blast is admitted from the pipe E, and from which itpasses through the perforations a into the grain surrounding said shaftand escapes through the open top F, Fig. 2, into the surrounding air.

The hollow shafts D are provided with the feeding-threads b,bymeans ofwhich the grain is fed through the cylinder from end to end in the usualway, the motion being reversed in each alternate cylinder.

Thus far there is nothing new in the abovedescribed apparatus; and myimproved invention consists, in a conveyer for graindriers, in thecombination of a hollow perforated shaft, a screw-thread extendingspirally around said perforated shaft, and a series of tapering paddlesset into said perforated shaft at right angles to the screw-head.

The necessity of the paddles H arises from the fact that the grain seeksto remain at the bottom of the conveyer, and hence the perforations a onthe upper portion of the perfo rated shaftD frequently becomes exposedand waste a corresponding quantity of the hot blast, which in said casepasses out of the conveyer through the slot F without having had anyeffect upon the grain which lay entirely below it. The paddle correctsthis difficulty because being set practically at right angles to theperforated shaft, as shown in Fig. 3, it serves as a scoop to lift upthe grain from the bottom of the conveyer as the shaft revolves andspreads it over the top of the perforated shaft, thus keeping itconstantly covered.

Manyforms of this paddle might be adopted; but I have found the betterform to be one which tapers gradually from a point near the edge of thescrew-thread down to the surface of the perforated shaft, as shown inFig. 1.

Althoughl have shown two of the paddles between each spiral of thescrew, I have found that for ordinary purposes a single paddle for eachspiral is sufficient.

The object of the pipe I for carrying the hot blastinto the perforatedshaft D, as shown in Fig. 1, beyond the bearing on which the said shaftturns will be readily appreciated by all who have had experience withhot journal-boxes, and it is preferable to construct this pipe Islightly tapering, so that the joint may be more perfect and that thehearing may be somewhat cooled by the tendency of the air immediatelysurrounding the-smaller end of the pipe I to become rarefied.

The purpose of constructing the conveyer in separate pieces heldtogether by the bands G is to facilitate the taking apart of theconveyer, for cleaning the same or to repair the conveying-shaft, thescrewof-which is more or less liable to break if the conveyer becomesclogged. By removing one or more of "the clamps Gthe first plate d canbe taken oif without disturbingthe rest of the conveyer -and and for thepurposes specified.

EDWARD M. PARKER. [L. 8.]

Witnesses:

M. F. RANDOLPH, W. P. PREBLE; J r.

